package com.zhonglz.util.sys;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.InetAddress;
import java.net.UnknownHostException;


/***
 * 与系统相关的一些常用工具方法. 目前实现的有：获取MAC地址、IP地址、主机名
 * @author zhonglz
 */
public class SystemTool {


 /**
 * 获取当前操作系统名称.
 * return 操作系统名称 例如:windows xp,linux 等.
 */
 public static String getOSName() {
  return System.getProperty("os.name").toLowerCase();
 }
 
 /**
 * 获取unix网卡的mac地址.
 * 非windows的系统默认调用本方法获取.如果有特殊系统请继续扩充新的取mac地址方法.
 * @return mac地址
 */
 public static String getUnixMACAddress() {
  String mac = null;
  BufferedReader bufferedReader = null;
  Process process = null;
  try {
   process = Runtime.getRuntime().exec("ifconfig eth0");// linux下的命令，一般取eth0作为本地主网卡 显示信息中包含有mac地址信息
   bufferedReader = new BufferedReader(new InputStreamReader(process
     .getInputStream()));
   String line = null;
   int index = -1;
   while ((line = bufferedReader.readLine()) != null) {
    index = line.toLowerCase().indexOf("hwaddr");// 寻找标示字符串[hwaddr]
    if (index >= 0) {// 找到了
     mac = line.substring(index +"hwaddr".length()+ 1).trim();//  取出mac地址并去除2边空格
     break;
    }
   }
  } catch (IOException e) {
   e.printStackTrace();
  } finally {
   try {
    if (bufferedReader != null) {
     bufferedReader.close();
    }
   } catch (IOException e1) {
    e1.printStackTrace();
   }
   bufferedReader = null;
   process = null;
  }


  return mac;
 }


 /**
 * 获取widnows网卡的mac地址.
 * @return mac地址
 */
 public static String getWindowsMACAddress() {
  String mac = null;
  BufferedReader bufferedReader = null;
  Process process = null;
  try {
   process = Runtime.getRuntime().exec("ipconfig /all");// windows下的命令，显示信息中包含有mac地址信息
   bufferedReader = new BufferedReader(new InputStreamReader(process
     .getInputStream()));
   String line = null;
   int index = -1;
   while ((line = bufferedReader.readLine()) != null) {
    index = line.toLowerCase().indexOf("physical address");// 寻找标示字符串[physical address]
    if (index >= 0) {// 找到了
     index = line.indexOf(":");// 寻找":"的位置
     if (index>=0) {
      mac = line.substring(index + 1).trim();//  取出mac地址并去除2边空格
     }
     break;
    }
   }
  } catch (IOException e) {
   e.printStackTrace();
  } finally {
   try {
    if (bufferedReader != null) {
     bufferedReader.close();
    }
   } catch (IOException e1) {
    e1.printStackTrace();
   }
   bufferedReader = null;
   process = null;
  }


  return mac;
 }
 
 
 /**
 * @return  本机主机名
 */
 public static String getHostName() {
  InetAddress ia = null;
  try {
   ia = InetAddress.getLocalHost();
  } catch (UnknownHostException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } 
  if (ia == null ) {
   return "some error..";
  }
  else 
   return ia.getHostName();
 }
 
 /**
 * @return  本机IP 地址
 */
 public static String getIPAddress() {
  InetAddress ia = null;
  try {
   ia = InetAddress.getLocalHost();
  } catch (UnknownHostException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } 
  if (ia == null ) {
   return "some error..";
  }
  else 
   return ia.getHostAddress();
 }
 


 /**
 * 测试用的main方法.
 * 
 * @param argc
 *            运行参数.
 */
 public static void main(String[] argc) {
  String os = getOSName();
  System.out.println("OS Type:"+os);
  if(os.startsWith("windows")){
   //本地是windows
   String mac = getWindowsMACAddress();
   System.out.println("MAC Address:"+mac);
  }else{
   //本地是非windows系统 一般就是unix
   String mac = getUnixMACAddress();
   System.out.println(mac);
  }
  System.out.println("HostName:"+getHostName());
  System.out.println("IPAddress:"+getIPAddress());
  
 }
} 
